<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>多背景</title>
  <style>
    .mobile-container {
      margin: 0 auto;
      width: 375px;
      min-height: 812px;
      background: linear-gradient(89.47deg, #000000 0.5%, rgba(0, 0, 0, 0.9) 99.3%) no-repeat left top/100% 132px, #ff6400;
    }
  </style>
</head>
<body>
  <div class="mobile-container">
    <section>

    </section>
  </div>
</body>
</html>